Vatech A9 (PHT-30CSS)
Technical manual
VDH-TeM-098
139 / 214
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3.
Noise evaluation
3.1. Noise standards
Parameter
ROI 1
ROI 2
ROI 3
Remark
Noise(Dev)
40 or less
30 or less
-
3.2. Phantom Specification
QUART Phantom
QUART - Ball Phantom
3.3. Test Method
1. Run the Console Software and click the PANO button to go into PANO mode.
2. Choose the PANO Phantom mode, and click the Confirm button.
3. Attach PANO BALL P Quart Phantom Ass'y on Chinrest.
4. Click the READY button, and acquire/save the image according to the Console Software
guidance.
5. Run VAKCAP.exe
6. Click the Panorama tab and click V Pan to open View 16.
7. Click brw and select "ampt.raw" created in the
C:\VCaptureSW\Acquisition\PANO\WidePANO\PROJ_exposure time folder.
8. Set it as [M size = 40] and evaluate noise(dev) and Homogeneity(ave) of each ROI.
3.4. Test Result
Parameter
ROI 1 (600, 800)
ROI 2 (2550, 800) ROI 3 (1574, 800)
Pass/Fail
Noise(Dev)